School



7 (No Model.)

P. G. GIRO'UD.

TIME INDICATOR.

N0.'410,967. Patented Sept. 10,1889.

7 .B I a,

UNITED STATES PATENT OFFICE.

PETER G. GIROUD, OF BROOKLYN, ASSIGNOR TO THE NEIV YORK SCHOOL BOOKCLEARING HOUSE, OF NEYV YORK, N. Y.

TIME-INDICATOR.

SPECIFICATION forming part of Letters Patent No. 410,96'7, datedSeptember 10, 1889. Application filed January 23, 1889. Serial No.297,251. (No model.)

To all whom it may concern.-

Be it known that I, PETER G. GIROUD, of

' Brooklyn, in the county of Kings and State of New York,have invented acertain new and useful Improvement in lime-Indicators, of which thefollowing is a specification.

My improvement relates to a class of timeindicators adapted to indicatetime when manipulated by hand.

I will describe in detail a time-indicator embodying my improvement, andthen point out the novel features in claims.

In the accompanying drawings, Figure 1 is a faceview of a clock-dial andcertain portions of mechanism for indicating time which I employ. Fig. 2is a section thereof taken on the plane of the line 00 m, Fig. 1. 4.,and 5 are detail views of certain parts.

Similar letters of reference designate corresponding parts in all thefigures.

A A designate plates, which plates maybe made of wood or other suitablematerial. Upon them are lineated clock-dials.

B B designate, respectively, minute and hour hands. In the example shownin Fig. 2 the minute and hour hands B B move over clock-dials upon eachof the plates A A, and they are adapted to be operated in unison.

As the mechanism for operating each set of hands is like the other, Iwill describe but one.

C designates a shaft, which shaft extends parallel with the clock-dials,and in this instance between the plates A A, where two are used. Whereonly one is used, the shaft will extend along the rear side of theplate. The shaft is journaled in suitable bearings near its outer end inthe plate, and near its inner end in a plate a, secured to a back platea for the movement, the back plate being in turn secured to the plate.The back plate incloses a recess cat-in which is arranged the movement.Mounted upon the shaft 0, near its inner end, is a gear-wheel D, whichgearwheel gears with a layer-pinion cl, formed upon or connected with acannon-pinion d. The cannon-pinion (1' gears with a minutewheel (1mounted upon a pin or stud d. Formed with or secured to the minute-wheel01 is an hour-pinion d, which pinion gears with an hour-wheel d formedupon or com nected with a tubular arbor d. The arbor Figs. 3,-

(Z surrounds the cannon-pinion sleeve (1 The cannon-pinion is mountedupon a fixed stud (i which is rigidly secured upon the back plate a. Thehour-hand B is friction-tight upon the arbor d upon the hour-wheel. The

outer extremity of the cannon is squared to receive the minute-hand.When the shaft 0 is rotated, as may be done by a hand-piece c, motion istransmitted from the gear-wheel D to operate the minute and hour hands,the gearing being such that each time the minutehand completes a circuitof the dial the hourhand will move a distance between two of thehour-figures upon the dial.

I have shown a spring E more clearly in Fig. 5, and which is shown asthree-armed, arranged between the back plate a and the cannon-pinion,which operates to hold the latter in operative position. The stud (1passes through an aperture ein the spring E. The outer end of the stud dis flattened and screw-threaded. The flattened portion receives adisk-spring F, (shown more clearly in Fig. 4,) and is provided with asuitable aperture f for this purpose. The disk-spring bears against theminute-hand B. Screw-threaded to the stud d outside the spring F, is anut g, which maintains the spring in proper position, the Wholeoperating to properly maintain the minute-hand upon the cannon. Byflattening the portion of the stud d which receives the spring F thelatter cannot be turned upon the stud by the movement of theminute-hand, and the nut g cannot therefore be unscrewed.

Where two sets of indicators are to be used, as will sometimes be foundto be advantageous, the gear-wheel D operates to cause movement of theminute and hour hands upon one side in a reverse direction to those uponthe other side, so that the time will be properly indicated upon bothsides.

It will be'seen that by my improvement very few parts are employed, andthe arrangement in such that no rotation of the central arbors isrequired.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In a time-indicator, the combination, with a dial, of a shaftextending tothe exterior of the indicator and parallel with the saiddial,

a gear-wheel on said shaft, a cannon-pinion operated from saidgear-wheel, a fixed stud upon which said cannon pinion is looselymounted, a ininntehand deriving motion from said cannon-pinion, and atrain of gears operated from the cannon-pinion to operate an hour-hand,substantially as specified.

2. In a time-indicator, the combination, with a dial, of a shaftextending to the exterior of the indicator and parallel with said dial,a gear-wheel 011 said shaft, a layer-Wheel With which said gear-wheelengages, a cannon-pinion connected to said layer-Wheel, a fixed studupon which said layer-wheel and cannon-pinion are mounted, a minute-handderiving motion from said cannon-pinion, an hour-hand, and a train ofgears operated from the cannon-pinion to operate the hour-hand,substantially as specified.

3. In a time-i ndicator, the combination, with a dial, of a shaftextending to the exterior of the indicator and parallel with said dial,a gear-Wheel on said shaft, a cannon-pinion operated from saidgear-wheel, a fixed stud upon which said cannon-pinion is mounted, aspring placed upon said stud, so as not to be capable of rotation, saidspring being outside the minute-hand and bearing against the same, and anut engaging said stud outside said spring, substantially as specified.

4. In a time-indicator, the combination, With a back plate, of a shaftextending to the exterior of the indicator, a gear-Wheel mounted on saidshaft, a stud rigidly secured in said back plate, a cannon-pinionloosely mounted on said stud and with which said gear-wheel engages, aminute-hand deriving motion from. said cannon-pinion, an hour-hand, atrain of gears operated from the cannon-pinion to 0perate the hour-hand,and a spring arranged intermediate of said cannon-pinion and back plate,substantially as and for the purpose specified.

PETER G. GIROUD.

Witnesses:

FREDK. HAYNES, ARTHUR C. GAMBLIN.

